1 error: `extern` block uses type `impl TraitA`, which is not FFI-safe
2 --> $DIR/lint-ctypes-73251-2.rs:32:25
4 LL | pub fn lint_me() -> <AliasB as TraitB>::Assoc;
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
7 note: the lint level is defined here
8 --> $DIR/lint-ctypes-73251-2.rs:5:9
10 LL | #![deny(improper_ctypes)]
12 = note: opaque types have no C equivalent
14 error: aborting due to previous error